Holy water, (also known as fairy water or repellent), is a repellent the Dragon Quest series. It is used to avoid random encounters, simulating the Holy Protection spell. In Dragon Quest IV, it can be used to give minor damage to monsters in battle. In Dragon Quest IX, its function was altered slightly to simulate the Vanish ability.

Captain N and Princess Lana purchase this at the item shop as it's the only thing left. Unlike Dragon Quest, the effect of the water is that it can be used against evil magic. It's ultimately used to remove the Cursed necklace from Simon Belmont.